The Murphy 0-100 PSI Mechanical Pressure Swichgage with Snap-Acting Switch 20PE-100 is a diaphragm-actuated, pressure-indicating gage with a built-in electrical switch. This swichgage is used for tripping alarms and/or shutdown devices. The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument. Accuracy and protection from moderate overpressure is assured by a unique, unitized diaphragm chamber. A built-in pulsation dampener helps eliminate pointer flutter and is removable for cleaning.
The 20PE-100 features internal snap-acting SPDT switch, instead of the single pole/pointer contacts. When the switch closes on falling pressure, it becomes Set, as pressure rises the switch Resets. The gage pointer acts as a pressure indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contacts are grounded through the Swichgage case and have self-cleaning motion to ensure electrical continuity. The gage pointer makes with an adjustable contact to complete a pilot-duty circuit.
Specifically designed to protect engines/equipment in oil field, marine, irrigation, construction and trucking applications to monitor engine lube pressure, water pump pressure, hydraulic pressure and air pressure.
- 2 inch/51 mm dial
- Combination Indicating Gage and Limit Switch
- Switch Can Activate Alarms and/or Shutdown Equipment
- Exceeds SAE Standards
- Internal Snap-Acting SPDT Switch
Part No.: 20PE-100
Range: 0-100 psi (0-689 kPa)
Dial: White on black, dual scale; U.S.A. standard scale is psi/kPa
Case: Plated steel; mounting clamp included (except for direct mount models)
Bezel: Polished stainless steel
Lens: Polycarbonate, high-impact
Oil: Silicon Oil
Temperature Range: Ambient: -40°F (-40°C) thru 150°F (66°C); Process: -40°F (-40°C) thru 250°F (121°C)
Process Connection: 1/8-27 NPTM brass
Sensing Element: Beryllium copper diaphragm
Snap-Switch Rating: SPDT, 3 A@ 30 VDC inductive; 4 A @ 125 VAC inductive
Snap-SwitchWire Leads: 20 AWG (0.75 mm2) x 12 in. (305 mm)
Unit Weight: 8 oz. (0.23 kg)
Unit Dimensions: x 3 x 3 in. (76 x 76 x 76 mm)